Why do you ask?
If you're concerned about an OD, or overmedication, you need to seek immediate in person medical attention, calling an ambulance if necessary.
Hi Mohd8. Welcome to the forum.. If you can give a lil more info maybe some of us can help.. The only antidote I can think for injecting drugs is to stop.. Break the rig get off the drugs.. It is possible. I hope you stick around read the forum and gain the Courage to take your life back.. I wish you well, lesa